System Design · Junior · Question 54 of 75

What does the browser do with cookies that `localStorage` doesn't do?

✓Correct answer: Sends cookies automatically with matching requests; localStorage stays in the browser until JavaScript reads it
2Encrypts cookies by default
3Stores cookies forever

Explanation

Automatic sending is convenient for sessions but enables CSRF, so cookies need flags like SameSite, HttpOnly and Secure.

Further reading

Test yourself

Take the System Design · Junior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.